Mosquitos or other pests can ruin your day . The problem is that you forgot your mosquito repellent. Go to the App Store on your iPhone and download sonic repellent apps like Anti Mosquitto Sonic Repeller or Ultrasonic Repeller.
These apps use high frequency noise to repel certain pests. There is a free app for the iPhone called Mosquito Buster that has a “mosquito mode” where it uses noise from 6000hz to 9000hz, which repel pests like mosquitos. Tap the coil to toggle the noise on and off. There is also a Rats and Youth mode, which uses the same technique.